Research on Reasonable Finite Element Modeling Methods for Prestressed Self-Centering Joints
Prestressed self-centering structures exhibit excellent self-centering capabilities,significantly reducing residual deformations after seismic events.The connection forms at the joints are critical to their self-centering performance and seismic resistance.To advance the optimization design of such structures,extensive research and parametric analyses are required.Appropriate modeling approaches can more effectively simulate the actual stress conditions of the structures.The core problems in the finite element analysis of prestressed self-centering joints are systematically discussed.The numerical simulation of prestressed self-centering joints with built-in energy-consuming steel bars and angle steel energy-consuming prestressed self-centering joints is carried out by ABAQUS.The following conclusions are drawn:for the regular reinforcement constitutive models,the use of hysteresis models yields slightly better results than the bilinear models,although the overall difference is small;both the cooling method and the MPC method can better apply prestress,and the effect of the two methods is the same;the virtual tendon method can better simulate the slip of prestressed tendons,with a high degree of agreement in joint bearing capacity and hysteresis curves,while also requiring less workload to the coupling method and the spring method.
prefabricated concrete structuresself-centering jointshybrid connection jointsfinite element analysismodeling method
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